Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '940c565fbf54781edd77e83b7fe6f861719d46da0ac90fe5ac1cad2c2d07e3fc' 
  AND token = 'xWk1J5z8b5xcUySlKuvZgTwyi3v6bE1lhmbhVO3cwa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}